Having a valid backup of the control file of a database is crucial for the successful recovery of a database. Due to this we will take a closer look at the available methods to make a user-managed backup of a control file.
Always do a backup of the control file after making a structural change to a database operating in the
ARCHIVELOG mode such as creating, deleting, or modifying a tablespace, due that this new information will not be available on previous backups of the control file.
You can generate a binary copy of the control file via a simple SQL statement. A binary copy of the control file contains additional information such as the archived redo log history, offline range for read-only and offline tablespaces, ...